$l-height-max:30;
$size-max:  80;
$weight-max: 9;

//
@for $i from 1 through $l-height-max{
  .l-ha#{$i}{line-height:1em + $i*0.1em;}
}

//
@for $i from 10 through $size-max{
  .f#{$i}{font-size:$i*1px;}
}
//
@for $i from 3 through $weight-max{
  .b#{$i}{font-weight:$i*100;}
}

.bold {font-weight: 700 !important; }
.thin {font-weight: 300 !important; }